/* ===== Reset & base ===== */
:root {
  --bg-dark-1: #0b1220;
  --bg-dark-2: #0f2834;
  --glass: rgba(255,255,255,0.06);
  --accent: #00e5ff;
  --accent-2: #5eead4;
  --text-light: #e6f7fb;
  --text-dark: #0f1724;
  --card-radius: 14px;
  --container-max: 1200px;
  --shadow: 0 10px 30px rgba(12,18,26,0.5);
  --glass-border: rgba(255,255,255,0.08);
  --transition: 0.28s cubic-bezier(.2,.9,.3,1);
}

/* Light theme */
:root[data-theme="light"] {
  --bg: linear-gradient(180deg,#f7fbfe,#eef6fb);
  --surface: rgba(255,255,255,0.85);
  --text: var(--text-dark);
  --muted: #345;
  --glass: rgba(255,255,255,0.85);
  --glass-border: rgba(15,20,30,0.06);
}

/* Dark theme (default) */
:root[data-theme="dark"] {
  --bg: linear-gradient(135deg,var(--bg-dark-1),var(--bg-dark-2));
  --surface: rgba(10,14,20,0.5);
  --text: var(--text-light);
  --muted: #9fb7bf;
}

/* Global base */
* { box-sizing: border-box }
html, body { height: 100% }
body {
  margin: 0;
  font-family: "Poppins", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: var(--bg);
  color: var(--text);
  transition: background var(--transition), color var(--transition);
  -webkit-tap-highlight-color: transparent;
}

/* Utility */
.container {
  width: 92%;
  max-width: var(--container-max);
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}
.logo { height: 64px; display: block }
.brand { display: flex; align-items: center }

/* Nav */
.nav {
  display: flex;
  gap: 1.2rem;
  align-items: center;
}
.nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}
.nav a:hover,
.nav a:focus {
  color: var(--bg-dark-1);
  background: linear-gradient(90deg, rgba(0,229,255,0.12), rgba(94,234,212,0.06));
}

/* Header actions */
.header-actions {
  display: flex;
  gap: .6rem;
}
.theme-toggle, .nav-toggle {
  background: linear-gradient(90deg,var(--accent),var(--accent-2));
  border: none;
  color: #052;
  cursor: pointer;
  height: 40px;
  width: 40px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
  transition: transform var(--transition), box-shadow var(--transition);
}
.theme-toggle:hover, .nav-toggle:hover { transform: translateY(-3px) }
.nav-toggle { display: none }

/* Hero */
.hero { padding: 48px 0 }
.hero-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
  align-items: center;
}
.hero-content h1 {
  font-size: clamp(1.6rem, 2.8vw, 2.6rem);
  line-height: 1.1;
  margin: 0 0 12px;
}
.hero-content .accent {
  background: linear-gradient(90deg,var(--accent),var(--accent-2));
  -webkit-background-clip: text;
  color: transparent;
}
.lead { color: var(--muted) }
.hero-img {
  width: 100%;
  max-width: 520px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

/* CTAs */
.btn {
  display: inline-flex;
  gap: .6rem;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 12px;
  border: 0;
  cursor: pointer;
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  text-decoration: none;
  color: inherit;
}
.btn.cta {
  background: linear-gradient(90deg,var(--accent),var(--accent-2));
  color: #022;
  box-shadow: 0 10px 30px rgba(0,229,255,0.14);
}
.btn.ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text);
}
.btn:hover { transform: translateY(-4px) }

/* Sections */
.section { padding: 54px 0 }
.section h2 {
  margin: 0 0 18px;
  font-size: 1.6rem;
  color: var(--accent);
  text-shadow: 0 6px 24px rgba(0,229,255,0.06);
}

/* Services grid */
.services-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
}

/* Cards */
.card, .project-card {
  background: var(--surface);
  border-radius: var(--card-radius);
  padding: 18px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.card img, .project-card img {
  width: 100%;
  border-radius: 10px;
  object-fit: cover;
}
.card h3, .project-card h3 { margin: 6px 0 4px }
.card p, .project-card p { margin: 0; color: var(--muted) }
.card:hover, .project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 18px 40px rgba(0,0,0,0.5);
}

/* Projects grid (realisations) */
.projects-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
}
.project-content { display: flex; flex-direction: column; gap: 10px }
.project-content .btn { align-self: flex-start }

/* Testimonials */
.testimonials-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
}
.testimonial {
  background: var(--surface);
  padding: 18px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 20px rgba(0,0,0,0.35);
}
.testimonial p { margin: 0 0 8px; color: var(--text) }
.testimonial footer { font-size: .85rem; color: var(--muted) }

/* Contact form */
.contact-form {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
}
.contact-form input, .contact-form textarea {
  padding: 12px;
  border-radius: 10px;
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.03);
  color: var(--text);
}
.contact-form textarea { grid-column: 1/-1; resize: vertical; min-height: 120px }
.form-actions { display: flex; gap: 12px }

/* Footer */
.site-footer {
  padding: 28px 0;
  border-top: 1px solid rgba(255,255,255,0.03);
  text-align: center;
  color: var(--muted);
}

/* Responsive rules */
@media (min-width:900px) {
  .hero-grid { grid-template-columns: 1fr 1fr }
  .hero-figure { text-align: right }
  .contact-form { grid-template-columns: 1fr 1fr }
}
@media (max-width:899px) {
  .nav { display: none; position: fixed; top: 72px; right: 12px; flex-direction: column; min-width: 210px; padding: 14px; border-radius: 12px; background: var(--surface); box-shadow: var(--shadow) }
  .nav.nav-open { display: flex }
  .nav-toggle { display: inline-flex }
  .hero-figure { order: -1; text-align: center }
  .contact-form { grid-template-columns: 1fr }
}
@media (max-width:520px) {
  .logo { height: 52px }
  .hero-content h1 { font-size: 1.6rem }
  .theme-toggle,.nav-toggle { height: 36px; width: 36px }
}